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RackAttack RackAttack  >  Q: How to use the RackAttack's Easy Patterns ?
 >  Q: Is there a special easter egg page?
 >  Q: What are the available controller numbers of OS 1.05?
 >  Q: Checksum Error on OS dump?
 >  Q: Where to get the semi transparent knobs?
 >  Q: Why do some synths produce clicks?
 >  Q: What freeware software to load updates and sounds to Waldorf synths?
 >  Q: were do we find Waldorf support technicians worldwide?

Q: How to use the RackAttack's Easy Patterns ?

A: Activation of the Easy Pattern Mode

Press Shift+Play. All edited Patterns will be lost as the edit buffers for patterns are cleared. The pattern for Instrument 1 will be set to a basic base drum pattern, four to a bar in 1/16th, the Pattern will be set to GroupLatch and Group A and Group A will be triggered, Auto Select is switched on.

Re-Activation of Easy Pattern Mode

To edit an existing pattern, do not activate as described above, as that would clear the pattern. Instead, trigger Group A and switch on Auto Select manually. You can then edit the patterns in the same way as described above. In fact, the only condition for this to work seems to be that the patterns to be edited have to be assigned to the currently playing group, so you can also edit patterns in groups B and C just fine.

Recovery of accidental activation

Any pending edits are lost forever, but you can recall any part of the program or the complete program from the Utility menu.

Editing Patterns in Easy Pattern Mode

Pattern and note length as well as step clock can be edited from the corresponding edit menu. You can also edit the patterns there, but the point of the Easy Pattern Mode is this: Select an instrument, press Shift and trigger the instrument at the point in the pattern where you want it to play. You can do this with the trigger buttons or from MIDI. As long as Auto Select is on, the first key press within the map range at the keyboard will select the corresponding instrument, all subsequent keypresses of the same key enter notes into the pattern for that instrument. Be aware that any trigger button assigned to a group will just start the group, so you may have to use the Selected trigger button for the instruments that are hidden behind a group trigger.    ^ 
Q: Is there a special easter egg page?

A: RackAttack Easter Egg:
Hold down the Peek, Play and Global button - don´t miss to take alook at the display.....

Holger "Tsching" Steinbrink (Waldorf Music AG)    ^ 
Q: What are the available controller numbers of OS 1.05?

A: #11-31: Volume for sound 1-21
#33-34: Volume for sound 23-24
#35: Volume for sound 22
#36-63: Pan for sounds 1-24
#65-88: FX1 send for sounds 1-24    ^ 
Q: Checksum Error on OS dump?

A: Please check first:

* slow down your sequencer (120 bpm should work fine, but lower to 90 bpm when you get trouble)
* make sure midi clock is not sent
* make sure no other midi events (metronome etc.) are sent at the same time

Then check this:

* make sure you have no MIDI loop. If in doubt unplug the MIDI out from the synth.
* when downloading with Netscape make sure to use the latest version (some older versions mangled the download file)
* when using a Mac make sure to use the latest unzip software because there have been problems with the unzip
* if all does not help try to download the unzipped version at the ftp server.

Additional info:

Some midi hardware causes problems with SysEx. When I recall right it was one piece from Mark Of The Unicorn (MOTU) that caused lots of trouble.

for Q: 
for mQ: 
for RackAttack:     ^ 
Q: Where to get the semi transparent knobs?

A: The german company ALBS sell them under the name "Drehknopf DK16-190V3 A.6/4,5 AT=14,5 schwarz soft-transparent klar" with the article number 863063. Minimum order is 50,- without VAT.     ^ 
Q: Why do some synths produce clicks?

A: Chapter 1: The click in theory
A click is produced when a very fast level change in the audio signal
occurs. You can easily check that on your home stereo when you play
back a CD and switch the Source Selector back and forth between CD
and a source that doesn't play anything.

The brightness of the click depends on the speed of the level change.
The faster the level changes, the brighter is the click. So, the
level change speed can be compared with the cutoff of a lowpass
filter. There is an easy formula for it:

Let's consider a level change from full to zero (or from zero to
full) output from one sample to another on a machine that uses
44.1kHz sample rate. So, we first transfer the sample to milli

1 sample equals 1/44100 second, which is = 0.02267573696ms.

To calculate the cutoff frequency of the click, just use this formula:

Cutoff (Hz) = 1000 / Level Change Time (ms)

which in the example results in:

44100Hz = 1000 / 0.02267573696ms

Whoops? This the sampling frequency and, err, very bright.

Chapter 2: The click in the real world
Now, how could this knowledge help you and what has it to do with
Waldorf synthesizers? Easy:

When you play a sine wave sound, only the base frequency (the
fundamental or the 1st harmonic) is present. That means, when you
play note A=110Hz, no other frequencies are involved except this
110Hz oscillation.

Now, what happens when you abruptly cut the sine wave to zero when it
just is at its maximum level? You get the same effect as with your
home stereo.
From one sample to the next, the waveform is brought from maximum to
zero, resulting in the forementioned bright click.

The same applies when the opposite happens. On Waldorf synthesizers,
you can setup the oscillators so that their phases start randomly
when a new note is played. So, you never know at which level the sine
wave is when you hit a note.
Consider it would be at the maximum level, you would get an immediate
change from zero to maximum when the amp envelope's attack rate is
set to 0.

BTW: the effect is the same, when you have a bright waveform but
filter it so that it is very hollow.

Chapter 3: In which situations does the click occur on my Waldorf synth?
There are several situations when you can get a click and when you
know where they happen, you can try to prevent them:

* Amp Envelope Attack. On digital Waldorf synthesizers like the MWII
and the Q, the Attack rate can be as short as 1 sample. This means
that the amp volume of a note can change from zero to maximum in one
sample, or in ms: 0.02267573696ms. This results in a very bright
On the Pulse, we chose a minimum attack rate of 1.9ms, resulting in a
click with a maximum cutoff of around 526Hz. When you own a Pulse,
you probably know of the 1.9ms number from the user's manual, because
that's the update speed of all CVs that are used in it.
So, when you hear a click on note start every now and then, just
increase the Amp Envelope Attack rate until you don't hear a click

* Amp Envelope Release. Here, the same as with the Attack rate applies.
When you hear a click when you release a note, increase the Amp
Envelope's Release rate.
If the click still persists, you should also check the Release rate
of the Filter Envelope. Maybe the filter closes very fast, which can
result in a click, too.

* Voice Stealing. We know that this is the most annoying situation.
But, the click helps you: When you hear a click at a certain position
in your song, you know that a voice stealing happened and you can
easily shorten or delete notes in the editors of your sequencer.
When you count the notes and say that they don't exceed the maximum
number of voices of your synthesizer, just keep in mind that other
notes might still be in their release phases and therefore have to be
added, too.

* Mono mode. In Mono mode, a click might occur when any envelopes
(Amp or maybe Filter, too) are set to retrigger on new notes. When
the Attack rate of a sound is greater than 0, they are brought to
zero so that they can go up to their full level again. This rapid
change to zero results in a click.

* Unisono sounds. Here, a click might occur even heavier. Unisono
sounds easily exceed the maximum number of voices and because they
steal not only one but **several** notes at once, a click can be a
lot more present. It is louder and happens more often. You should
check several points on unisono sounds to lower clicks as much as
possible: are the envelope rates set to reasonable values, are the
oscillator phases set to free, is filter keytrack set to 0% (because
this can also be a rapid change) and so on.

Chapter 4: Why does my synth xy (insert product name here) produce no clicks
Should I really answer that? Because it is slooooow.
Some japanese manufacturers (I don't say names here) prevent voice
stealing clicks by fading out voices slowly before they start new
notes. Hey, brillant idea, why doesn't Waldorf do that? Because it
ends up in a very bad MIDI timing (and those japanese synths are
**well-known** for that).
Furthermore, most of these synths are sample-based, which means that
their attack behaviour is stored in the sample that they should play.
So, a click on note start is also not possible because the sample
somehow gradually fades from zero to maximum.
If those synths allow you to change the sample start position, they
hopefully produce clicks, too (if not, they also have slow envelopes
which we don't hope).

A couple of days ago, someone mentioned the Matrix 12 producing no
clicks on retriggering envelopes. Yes, that's correct, because the
Matrix 12's minimum attack rate is around 20ms. Or in other words:
its envelopes are among the slowest you can find in a synthesizer.
The same applies to all synthesizers of the Matrix series, because
they all used Curtis chips that had an automatic smoothing filter to
prevent steppiness. The older Oberheim synths like the 4-Voice were
better here.
Also, the Waldorf Microwave and the Waldorf Wave used those Curtis
chips, but when the Attack rates of the envelopes were set to 0, this
smoothing filter was temporarily switched off, resulting in an abrupt
change. Attack 1 there is the same as minimum attack on a Matrix

Chapter 5: Conclusion
You know that we at Waldorf could prevent clicks by increasing the
minimum envelope rates or allowing bad MIDI timing. We could also
prevent that the filter resonance can destroy your hearing ability or
that you could play a C major chord. But who are we that we could
decide what **you** want from a synthesizer. Clicks can even be
musically useful and add a kind of randomness to a song that brings
it to live. A very good example is the bad, ugly, annoying, but
famous and beloved keyclick on Hammond organs.
Recently I bought the latest Art Of Noise album "the seduction of
Claude Debussy" produced by Trevor Horn and played by the creme de la
creme (even including Lol Creme of 10CC and Godley&Creme) of
musicians and I heard a lot of clicks during a couple of tracks. I am
even quite sure that they came from Waldorf synths but I don't know
if. You can easily imagine that I had a smile on my face.

I hope you now have even more fun with your "clicking" Waldorf synth.    ^ 
Q: What freeware software to load updates and sounds to Waldorf synths?

A: "Midi-OX" for PC (95/NT/98/Me/2000/XP)
("MIDI-OX is copyrighted freeware, for non-commercial use.")


"SysEx Librarian" for Mac OS X (10.1. or later)
("SysEx Librarian is FREE to download and use.")
Q: were do we find Waldorf support technicians worldwide?


Achim Lenzgen [licenced to solder! :-) ]
D-56626 Andernach-Namedy
Phone: +49-2632-300811
Fax: +49-2632-300812


12041 burbank blvd
north hollywood ca
ph 818 506 4055


www:     ^ 
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